I felt cheated by the way grown-ups told me that the future of the world was bleak when I became a teenager in the 1970s. The pollution explosion was unstoppable. Global famine was inevitable. I genuinely want the next generation, my own kids, to know that actually it's possible that the future might be better than the past.

Government can encourage innovation, but mainly by doing less, not doing more.

Nowadays, ideas can meet and mate very much faster than before, and the Internet is only accelerating this process. So innovation is bound to accelerate.

I sense very little appetite for green efforts to persuade people to accept a frozen or declining standard of living for the sake of the environment. Recessions remind us that economic retreat or stagnation is painful, whatever the goal.